Move scrollview to original state - ios

Question

I want to move up the view when the keyboard appears and move the view back when the keyboard disappears. I use an scrollview for this.
I have this almost working. The bug that I have is this:
You trigger the keyboard to show
You trigger the keyboard to hide
Things are going great so far.
You trigger the keyboard to show
You trigger the keyboard to hide <-- This doesn't work anymore, but the first time it works perfectly.
The code when the keyboard shows up (this works overtime):
func keyboardWasShown(notification: NSNotification) {
var userInfo = notification.userInfo!
let keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
let buttonOrigin: CGPoint = btn.frame.origin
let buttonHeight: CGFloat = btn.frame.size.height
var visibleRect: CGRect = view.frame
visibleRect.size.height -= keyboardFrame.size.height
if !visibleRect.contains(buttonOrigin) {
let scrollPoint = CGPoint(x: CGFloat(0.0), y: CGFloat(buttonOrigin.y - visibleRect.size.height + (buttonHeight + 8)))
scrollView.setContentOffset(scrollPoint, animated: true)
}
}
The code when the keyboard is going to hide (This code works the first time, it doesn't work the second time):
func keyboardWillBeHidden(notification: NSNotification){
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, -keyboardSize!.height, 0.0)
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
self.view.endEditing(true)
self.scrollView.isScrollEnabled = false
}
This is how my view looks like:
Everything needs to move up when the keyboard is showing. Moving up works:
But when the keyboard disappears it doesn't work:

Answer 1

Just change this Line
let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, -keyboardSize!.height, 0.0)
with
let contentInsets : UIEdgeInsets = .zero
or try This
//MARK:- Keyboard Methods
func keyboardWillOpen(sender:Notification) {
if let info = sender.userInfo{
if let keyboardSize = info[UIKeyboardFrameBeginUserInfoKey] as? CGRect{
let contentInsets = UIEdgeInsetsMake(0, 0, -keyboardSize.height, 0)
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
}
}
}
func keyboardWillHide(notification:Notification) {
if let info = notification.userInfo {
if let keyboardSize = info[UIKeyboardFrameBeginUserInfoKey] as? CGRect {
self.scrollView.contentInset = .zero
self.scrollView.scrollIndicatorInsets = .zero
}
}
}

Answer 2

I would not bother to scroll the scrollview, but instead move the scrollview itself.
Get the outlet of the scrollview bottom constraint, and, supposing the scrollview is fullscreen, set the constraint to zero when the keyboard is hidden, and then set it to the keyboard height (correct value is in the notification of keyboardwillshow).
Pseudo code looks like this :
func keyboardWillShow(notification: NSNotification) {
self.scrollviewBottomConstraint.constant = notification.keyboardheight;
self.layoutifneeded(); //I suggest you put this in a 0.3 second animation block
}
func keyboardWillHide(notification: NSNotification) {
self.scrollviewBottomConstraint.constant = 0;
self.layoutIfNeeded(); //I suggest you put this in a 0.3 second animation block
}